Time series and GLS periodograms of Gl 229. Left: Time series of the S index (first row), the RV computed for 1 formation temperature bin (second row), and the RV computed for four formation temperature bins (third to sixth row, in order of the coolest to hottest bin). For the S index, black points show nightly binned values and green points show nightly binned values smoothed with a 200-day rolling average. Middle: Correlations between the unsmoothed S index and corresponding RVs from the left panels. The Pearson correlation coefficients, which are summarized in Fig. 3, are shown in the upper left corners. Right: GLS periodograms of the S index and RVs from the left panels. The dashed lines show the corresponding 0.01% FAP levels.